Pet fountain



FIG. 1 is a perspective view of a pet fountain incorporating our new design, viewed from in front of, above, and from the left side thereof;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a rear elevation view thereof.

The dashed lines in FIGS. 1-7 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a pet fountain, as shown and described. 